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Phone	Nokia Lumia 635 (CDMA)	ZTE Z221	Samsung Galaxy Grand Prime (CDMA)	ZTE Engage LT / Engage MT
Current U.S. Carriers	(none)	(none)	(none)	(none)
Global Availability	Released	Released	Released	Released
Display Size	4.5" diag. 16 : 9	2" diag. 4 : 3	5" diag. 16 : 9	4" diag. 5 : 3
Display Resolution & Type	480 x 854 pixels (~218 ppi) LCD (TFT/TFD)	240 x 320 pixels (~200 ppi) LCD (TFT/TFD)	540 x 960 pixels (~220 ppi) LCD (TFT/TFD)	480 x 800 pixels (~233 ppi) LCD (TFT/TFD)
Display Refresh	?	?	60 Hz	60 Hz
Battery	1,830 mAh	900 mAh	2,600 mAh	1,900 mAh
Processor	1.2 GHz Qualcomm Snapdragon 400 (MSM8926)	?	1.2 GHz Qualcomm Snapdragon 410 (MSM8916)	?
RAM	512 MB	?	1.5 GB	1 GB
Storage	8 GB	142 MB	8 GB	4 GB
Main Camera	5 megapixel	Yes	8 megapixel	3 megapixel
Wide Camera	-	-	-	-
Tele Camera	-	-	-	-
Video Capture	720p HD	QCIF (176 x 144)	1080p HD	WVGA / 480p
Front Camera	-	-	5 megapixel	Yes
Weight	4.73 oz (134g)	3.24 oz (92g)	5.5 oz (156g)	5.09 oz (144g)
Dimensions	5.1" x 2.63" x 0.36" (130 x 67 x 9.1 mm)	3.76" x 1.92" x 0.73" (96 x 49 x 18.5 mm)	5.7" x 2.84" x 0.34" (145 x 72 x 8.6 mm)	4.78" x 2.54" x 0.46" (121 x 64 x 11.7 mm)
Form Factor	Slab	Clamshell	Slab	Slab
Platform / OS	Windows	(proprietary)	Android	Android
Network Bands	4G LTE: 25, 26, 41 WCDMA: 1, 2, 5 CDMA: 800, 850, 1900 GSM: 850, 900, 1800, 1900	WCDMA: 2, 5 GSM: 850, 900, 1800, 1900	4G LTE: 2, 4, 5, 12, 25, 26, 41 CDMA: 800, 850, 1900 *	CDMA: 850, 1700, 1900
Data Technology	LTE (Cat 3)	HSDPA 3.6	LTE (Cat 4)	EVDO rA
Features
Flashlight	-	-	Yes	-
GPS / Location	n/a	Yes	n/a	n/a
Accessibility
Adjustable Text Size	n/a	-	n/a	n/a
Hearing Aid Compatible	Yes M3, T4 (very tele-coil compatible)	Yes M3, T3 (mostly tele-coil compatible)	Yes M4, T4 (very tele-coil compatible)	-
Multiple Languages	n/a	Yes	n/a	n/a
TTY/TDD (Digital)	Yes	Yes	Yes	Yes
Alerts
Extra Display	-	Yes	-	-
Ringer Profiles	-	Yes	-	-
Connectivity
Bluetooth	Yes	Yes	Yes	Yes
Mobile Hotspot	n/a	-	n/a	n/a
NFC	-	-	Yes	-
USB	Yes Micro-USB	Yes	Yes Micro-USB	Yes Micro-USB
Wi-Fi	Yes 4 (802.11 b,g,n)	-	Yes 4 (802.11 b,g,n)	Yes
Contacts
Picture ID	n/a	-	n/a	n/a
Ringer ID	n/a	-	n/a	n/a
Voice Dialing	n/a	-	n/a	n/a
Customization
Custom Graphics	n/a	Yes	n/a	n/a
Custom Ringtones	n/a	Yes	n/a	n/a
Real-Music Ringers	n/a	Yes	n/a	n/a
Data & Network
Data Tethering	n/a	-	n/a	n/a
WAP / Web Browser	n/a	Yes	n/a	n/a
Input
Predictive Text Entry	n/a	Yes	n/a	n/a
Side Keys	Yes	Yes	Yes	Yes
Touch Screen	Yes Capacitive	-	Yes Capacitive	Yes Capacitive
Memory
Memory Card Slot	Yes	-	Yes	Yes
Messaging
Email Client	n/a	Yes	n/a	n/a
Instant Messaging	n/a	Yes	n/a	n/a
MMS	n/a	Yes	n/a	n/a
Text Messaging Templates	n/a	Yes	n/a	n/a
Music
FM Radio	Yes	-	Yes	-
Headphone Jack (3.5mm)	Yes	-	Yes	Yes
Music Player	n/a	-	n/a	n/a
Photo & Video
DLNA	Yes	-	-	-
Productivity
Alarm	n/a	Yes	n/a	n/a
Calculator	n/a	Yes	n/a	n/a
Calendar	n/a	Yes	n/a	n/a
To-Do List	n/a	-	n/a	n/a
Voice Memo	n/a	Yes	n/a	n/a
Software
Games	n/a	Yes	n/a	n/a
Java (J2ME)	n/a	Yes	n/a	n/a
Voice
HD Voice	-	-	Yes	-
Speaker Phone	Yes	Yes	Yes	Yes
	* Some versions only
	Nokia Lumia 635 (CDMA)	ZTE Z221	Samsung Galaxy Grand Prime (CDMA)	ZTE Engage LT / Engage MT
	X >	< X >	< X >	< X

NOTE: Differences are highlighted with bold / black text for visual clarity only.


Phone	Nokia Lumia 635 (CDMA)	ZTE Z221	Samsung Galaxy Grand Prime (CDMA)	ZTE Engage LT / Engage MT